Gas-burning fireplace



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GAS BURNING FIREPLAGE.

No. 537,340. Patented Apr. 9.1895.

(No Model.) 3 sheets-sheet 8..

H.G.&W.R. WS.

GAS BURNING P PLA l i l I IWW Hl I"l min, LIHWHWWMH V f mgm m In Verfors UNITED: STATESAv PATNT OFFICE.

HENRY G. DAWSON AND WILLIAM R. DAWSON, OF OHIOAGO,'ILLINOIS.

GAS-BURNING FIREPLACE.

SPECIFYICATION'. fOlmng part 0f LetterS Patent N0. 537,340, dated. April9, 1895. Application filed December 15I 3.894. Serial No. 531,886-(Nomodel.)

T0 all whom it mag/concern: v

Be it known that we, HENRY G. DAWSON and WILLIAM R. DAwsoN, citizens ofthe United States, residing at Chicago, in 'the county of Cook andStateof Illinois, have inventedcertain new and useful Improvements in Gas-Burning Fireplaces; and we do declare the foldental extinguishing ofsome of the jets; and

an increase of the general efficiency of the fire place.

It consists of a tire back, preferably of sheetmetal having a multiplenumber of burner ports extending substantially over its entire area andbeing covered by lips extending upwardly from the surface of the fireback, and

being spaced apart from it at their upper edges.

It consists further of a gas chest of which theflre back is the frontwall and from which the burner ports all lead. v

It consists further in the construction of the case for carrying the`fire back, in the manner described, wherebya free circulation of airand thelproper ventilation of the apartment are secured, .y

It consists in various minor parts as hereployed in the attempts thathave been made to spread the flame over the entire surface of the fireback including the location of numerous burner ports throughout itsarea, each adapted to throw a jet of iiame forward. Difficulty has beenencountered 'in this form of construction in securing'a uniform pressureat the Various ports, and inv preventing the accidental extinguishing ofa part of the jets,

while the result has been simply to stud the fire back with small jets,rather than to cover it with acontinuous'sheet of flame as desired; andif any of these jets areoverlooked in lighting the tire', vor if. theflame from any of' i and shown in the accompanying drawings, in

whichi Figure l, `is a vfront elevation of ourimproved'fireplacepwithsonie portions of the burner broken away. Fig. 2,is a vertical section of Fig. l, on the line V2-p-2. Fig. 3, is afrontelevation of the fire `back with some of its parts removed. Fig. 4,isa sectional view of Fig. 3, on lthe line Liz-4. Fig. 5, is a sectionalview of Fig. 3,V on the line 5-5. Fig. 6, is a detail of a part of theburner. an elevation of an ordinary open tire place with our improvedburner adjusted to it; and Fig. 8, is a vertical section of the same onthe line 8-8. Fig. 9, is a detailed section taken on the line 9--9 ofFig. v8.

The uprights of the frame of the iire place are shown at A; the uppercross-bar at a; the lower cross-bar at d'1; andthe open crown or baseplate at 0.2. A sheet metal shell or casing B, extending back from theframe A, a, and conforming -to the Vordinary form of the opening in aA're place, carries the fire back O, and its appurtenances and formstherewith the air flue b, leading from the crown c2, back vof the hreback and discharging into the apartment from beneath the hood D, Yprojecting forward and depending from the cross-bar a, the heated air beingthrown forwardly and downwardly. y v

The re back C, is secured tothe casing B, in any ,desired manner. A wallor partition extends upwardly from its top and leads to the frontof thefire place and is continued by the forwardly projecting depending hoodd, which is below the hood D, and which throws Fig. 7, isA

ICO

the heated air which ascends in front of the fire back'forwardly anddownwardly so that it does not cross the column of air dischargterialwill answer.

2 neuem ing from the flue b, and thereby check the circulation throughit. The lower portion of the partition c, is curved forwardly from nearthe top of the fire back forming acove M, and enlarging the upperportion of the flue b, thereby facilitating the heating of the airtherein.

A reflector plate c', extends from the cross bar a', to the base of thefile back, preventing the air which enters through the open crown piecea2, from being diverted from the flue b.

The fire back is formed of the front wallf, of a box F, made entirely ofsheet metal and having air tight joints. Gas Vfreely charged with air isdelivered to the box F, bya mixer c', served by a gas pipe E, whosevalve is located at E', and has a stem e, leading through the cross bara.

The wall f, is freely punctured with burner ports f', which we prefer tolocate in transverse rows as shown in Fig. 3, and which throw the gasjets directly forward from the face of the wallf. This arrangement ofthe burner ports is by no means essential. holes f is behind a li G,preferably of sheet metal, though any ot er incombustible masecured attheir lower edges to the surface of the wall f, by the rivets g, andincline upwardly away from it, their upper edges being, as shown, bentin toward the surface, though the exact form of these lips in crosssection may be varied according to the judgment of the maker. The effectof 'the lip is to form a pocket into which the gas is discharged fromthe burner port f', and which is open above. Within this pocket the gasis "burned in a mass, rather than in a jet and the fiame issues from themouth of the pocket well spread out, and when the holes f', are arrangedin transverse rows as shown, the flame from the lower series reaches upover the lip above and overlaps the fiame issuing from it.

By using one lip to cover a multiple number of burner ports, as shown,the pocket inclosed by it becomes filled with gas from end to end, andthe flame issuing from it is uniform in intensity, so that the locationof the ports is not indicated.

Asbestos in the wool form may be applied to the outer surface of thelips G, G', as shown at g', and also to the upper surface of the wall f,and the lower portion of the plate c.

The box F, is made of ample capacity so that tho supply of gas isuniform to all the burner holes.

In starting the fire it is well to allow the box to become well filledwith gas before ap- Each of the The lips G, are as shown,

as the temperature within the pockets formed by the-lips, is very highand the carbon is consumed before the contact of the cool air of theapartment chills it. This form of burner is equally efficient witheither the strong pressure at which natural gas is usually delivered tothe consumer, or the pressure ordinarily found in artificial gassystems, as the current of air which naturally ascends in front of thefire back does not interrupt the discharge of the gas from the burnerholesf', but on the contrary tends to facilitate the discharge of theflame from the mouth of the pocket. In consequence of this feature thefire may be regulated to suit the pleasure of the user by varying thegas supply,-an advantage not heretofore secured in gas burning fireplaces of this type. So completely are the burner holes protected fromthe pressure of the air currents that the gas will continue to burnafter the valve has been closed until the box F, is entirely emptied cfit, the flame expiring first at the bottom ot' the burner.

As the front wall f, of' the box F, becomes much hotter than its rearWalL'its expansion is greater and it tends to become bowed. Thistendency is `wholly overcome by the use of the stay bolts H, H, passingthrough both walls and carrying the sleeves 7L, h, whose length is equalto the normal distance between the walls.

Provision is made for discharging the products of combustion into thechimney flue by forming the flue I, leading from the front of the fireback through the plate c, and casing B. The walls t, of this flue areair tight so that it has no connection with the flue 6.

The Iiue I, is controlled by a damper K, closing its inner end andopenable by means of a crank rod 7c, extending forwardly through theface of the frame of the fire place and connected with the damper bymeans of the link 7o'.

It is obvious that the burner herein described is not dependent upon theframe shown for its success, although the two combined constitute anexceedingly efficient heater. The burner is adapted for separatemanufacture and to be `mounted within the various styles ofre places nowin use whether for the use of gas or coal.

We believe ourselves to be the first to provide for the discharge of amixture of gas and air into a pocket or trough within which it isburned, the flame issuing from an opening provided for that purpose. Wedo not desire therefore to be limited to the details of constructionherein described.

We claim as our invention- 1. A gas burner having an air and gas mixerand a substantially vertical face provided with rows of perforations forthe escape of the mixed gas and air, each of the several rows ofperforations having a detiector adapted to deflect the mixture upward ina substantially continuous sheet and the perforations and 'ICOdefiectors being so' spaced as to together discharge a practicallycontinuous sheetof the mixture over the face.

2. A gas burner having an air and gas mixer and a substantially Verticalface provided with rows of perforations for the escape of the mixed gasand air, each of the several rows of perforations havinga delectoradapted to deflect the mixture upward in a substantially continuoussheet, the perforations and deflectors being so spaced as to togetherdischarge a practically continuous sheetof the mixture over the face,and the deilectors and the inl tervening. portions of the face betweenthem being covered with wool asbestos.

3. Agas burner having an air and gas mixer and a substantially verticalface provided with a plurality of transverse rows of perforations forthe escape of the mixed gas and air, a lip secured at one side only tothe face and covering each row of perforations and forming with the facea pocket from which the mixture issues in a sheet, the distance betweenthe rows being such that the dame from one pocket will commingle withthat from the pocket immediately above it.

4. A gas burner having an air and gas mixer and a substantially verticalface provided with a plurality of transverse rows of perforations forthe escape of the mixed gas and air, a lip secured at one side only tothe face and covering each rowof perforations, and forming with the facea pocket from which the mixture issues in a sheet, the distance be- Ytween the rows being such that the dame from one pocket will comminglewith that from the pocket immediately above it, the exposed surfaces ofthe lips and face being covered with wool asbetos.

In testimony whereof we ax our signatures in presence of two witnesses.

HENRY G. DAWSON. WILLIAM R. DAWSON.

Witnesses: Y

SPENCER WARD, LOUIS K. GILLSON.

